#!/usr/bin/make -f
# -*- makefile -*-
#
# These rules should work for any debian-ish distro that uses systemd
# as init.  That does _not_ include Ubuntu 14.04 ("trusty"); look for
# its own special rule file.
#
# Please keep the diff between that and this relatively small, even if
# it means having suboptimal code; these need to be kept in sync by
# sentient bags of meat.

#export DH_VERBOSE=1
export DH_OPTIONS
export DH_GOPKG := github.com/snapcore/snapd
#export DEB_BUILD_OPTIONS=nocheck
export DH_GOLANG_EXCLUDES=tests
export DH_GOLANG_GO_GENERATE=1

export PATH:=${PATH}:${CURDIR}

include /etc/os-release

# On 18.04 the released version of apt (1.6.1) has a bug that causes
# problem on "apt purge snapd". To ensure this won't happen add the
# right dependency on 18.04.
ifeq (${VERSION_ID},"18.04")
	SUBSTVARS = -Vsnapd:Breaks="apt (<< 1.6.3)"
endif
# Same as above for 18.10 just a different version.
ifeq (${VERSION_ID},"18.10")
	SUBSTVARS = -Vsnapd:Breaks="apt (<< 1.7.0~alpha2)"
endif

# this is overridden in the ubuntu/14.04 release branch
SYSTEMD_UNITS_DESTDIR="lib/systemd/system/"

# The go tool does not fully support vendoring with gccgo, but we can
# work around that by constructing the appropriate -I flag by hand.
GCCGO := $(shell go tool dist env > /dev/null 2>&1 && echo no || echo yes)

# Disable -buildmode=pie mode on i386 as can panics in spectacular
# ways (LP: #1711052).
# See also https://forum.snapcraft.io/t/artful-i386-panics/
# Note while the panic is only on artful, that's because artful
# detects it; the issue potentially there on older things.
BUILDFLAGS:=-pkgdir=$(CURDIR)/_build/std
ifneq ($(shell dpkg-architecture -qDEB_HOST_ARCH),i386)
BUILDFLAGS+= -buildmode=pie
endif

GCCGOFLAGS=
ifeq ($(GCCGO),yes)
GOARCH := $(shell go env GOARCH)
GOOS := $(shell go env GOOS)
BUILDFLAGS:=
GCCGOFLAGS=-gccgoflags="-I $(CURDIR)/_build/pkg/gccgo_$(GOOS)_$(GOARCH)/$(DH_GOPKG)/vendor"
export DH_GOLANG_GO_GENERATE=0
# workaround for https://github.com/golang/go/issues/23721
export GOMAXPROCS=2
endif

# check if we need to include the testkeys in the binary
TAGS=
ifneq (,$(filter testkeys,$(DEB_BUILD_OPTIONS)))
	TAGS=-tags withtestkeys
endif

DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)

BUILT_USING_PACKAGES=
# export DEB_BUILD_MAINT_OPTIONS = hardening=+all
# DPKG_EXPORT_BUILDFLAGS = 1
# include /usr/share/dpkg/buildflags.mk

# Currently, we enable confinement for Ubuntu only, not for derivatives,
# because derivatives may have different kernels that don't support all the
# required confinement features and we don't to mislead anyone about the
# security of the system.  Discuss a proper approach to this for downstreams
# if and when they approach us.
ifeq ($(shell dpkg-vendor --query Vendor),Ubuntu)
    # On Ubuntu 16.04 we need to produce a build that can be used on wide
    # variety of systems. As such we prefer static linking over dynamic linking
    # for stability, predicability and easy of deployment. We need to link some
    # things dynamically though: udev has no stable IPC protocol between
    # libudev and udevd so we need to link with it dynamically.
    VENDOR_ARGS=--enable-nvidia-multiarch --enable-static-libcap --enable-static-libapparmor --enable-static-libseccomp --with-host-arch-triplet=$(DEB_HOST_MULTIARCH)
ifeq ($(shell dpkg-architecture -qDEB_HOST_ARCH),amd64)
		VENDOR_ARGS+= --with-host-arch-32bit-triplet=$(shell dpkg-architecture -f -ai386 -qDEB_HOST_MULTIARCH)
endif
    BUILT_USING_PACKAGES=libcap-dev libapparmor-dev libseccomp-dev
else
ifeq ($(shell dpkg-vendor --query Vendor),Debian)
    VENDOR_ARGS=--enable-nvidia-multiarch
    BUILT_USING_PACKAGES=libcap-dev
else
    VENDOR_ARGS=--disable-apparmor
endif
endif
BUILT_USING=$(shell dpkg-query -f '$${source:Package} (= $${source:Version}), ' -W $(BUILT_USING_PACKAGES))

%:
	dh $@ --buildsystem=golang --with=golang --fail-missing --with systemd --builddirectory=_build

override_dh_fixperms:
	dh_fixperms -Xusr/lib/snapd/snap-confine


# The .real profile is a workaround for a bug in dpkg LP: #1673247 that causes
# ubiquity to crash. It allows us to "move" the snap-confine profile from
# snap-confine into snapd in a way that works with old dpkg that is in the live
# CD image.
#
# Because both the usual and the .real profile describe the same binary the
# .real profile takes priority (as it is loaded later).
override_dh_installdeb:
	dh_apparmor --profile-name=usr.lib.snapd.snap-confine.real -psnapd
	dh_installdeb

override_dh_clean:
ifneq (,$(TEST_GITHUB_AUTOPKGTEST))
	# this will be set by the GITHUB webhook to trigger a autopkgtest
	# we only need to run "govendor sync" here and then its ready
	(export GOPATH="/tmp/go"; \
	  mkdir -p /tmp/go/src/github.com/snapcore/; \
          cp -ar . /tmp/go/src/github.com/snapcore/snapd; \
	  go get -u github.com/kardianos/govendor; \
	  (cd /tmp/go/src/github.com/snapcore/snapd ; /tmp/go/bin/govendor sync); \
	  cp -ar /tmp/go/src/github.com/snapcore/snapd/vendor/ .; \
        )
endif
	dh_clean
	$(MAKE) -C data clean
	# XXX: hacky
	$(MAKE) -C cmd distclean || true

override_dh_auto_build:
	# usually done via `go generate` but that is not supported on powerpc
	./mkversion.sh
	# Build golang bits
	mkdir -p _build/src/$(DH_GOPKG)/cmd/snap/test-data
	cp -a cmd/snap/test-data/*.gpg _build/src/$(DH_GOPKG)/cmd/snap/test-data/
	dh_auto_build -- $(BUILDFLAGS) $(TAGS) $(GCCGOFLAGS)

	# (static linking on powerpc with cgo is broken)
ifneq ($(shell dpkg-architecture -qDEB_HOST_ARCH),powerpc)
	# Generate static snap-exec, snapctl and snap-update-ns - it somehow includes CGO so
	# we must force a static build here. We need a static snap-{exec,update-ns}
	# inside the core snap because not all bases will have a libc
	(cd _build/bin && GOPATH=$$(pwd)/.. GOCACHE=/tmp/go-build CGO_ENABLED=0 go build $(GCCGOFLAGS) -pkgdir=$$(pwd)/std $(DH_GOPKG)/cmd/snap-exec)
	(cd _build/bin && GOPATH=$$(pwd)/.. GOCACHE=/tmp/go-build CGO_ENABLED=0 go build $(GCCGOFLAGS) -pkgdir=$$(pwd)/std $(DH_GOPKG)/cmd/snapctl)
	(cd _build/bin && GOPATH=$$(pwd)/.. GOCACHE=/tmp/go-build go build --ldflags '-extldflags "-static"' $(GCCGOFLAGS) -pkgdir=$$(pwd)/std $(DH_GOPKG)/cmd/snap-update-ns)

	# ensure we generated a static build
	$(shell	if ldd _build/bin/snap-exec; then false "need static build"; fi)
	$(shell	if ldd _build/bin/snap-update-ns; then false "need static build"; fi)
	$(shell	if ldd _build/bin/snapctl; then false "need static build"; fi)
endif

	# ensure snap-seccomp is build with a static libseccomp on Ubuntu
ifeq ($(shell dpkg-vendor --query Vendor),Ubuntu)
	# (static linking on powerpc with cgo is broken)
 ifneq ($(shell dpkg-architecture -qDEB_HOST_ARCH),powerpc)
	sed -i "s|#cgo LDFLAGS:|#cgo LDFLAGS: /usr/lib/$(shell dpkg-architecture -qDEB_TARGET_MULTIARCH)/libseccomp.a|" _build/src/$(DH_GOPKG)/cmd/snap-seccomp/main.go
	(cd _build/bin && GOPATH=$$(pwd)/.. CGO_LDFLAGS_ALLOW="/.*/libseccomp.a" go build $(GCCGOFLAGS) $(DH_GOPKG)/cmd/snap-seccomp)
	# ensure that libseccomp is not dynamically linked
	ldd _build/bin/snap-seccomp
	test "$$(ldd _build/bin/snap-seccomp | grep libseccomp)" = ""
	# revert again so that the subsequent tests work
	sed -i "s|#cgo LDFLAGS: /usr/lib/$(shell dpkg-architecture -qDEB_TARGET_MULTIARCH)/libseccomp.a|#cgo LDFLAGS:|" _build/src/$(DH_GOPKG)/cmd/snap-seccomp/main.go
 endif
endif

	# Build C bits, sadly manually
	cd cmd && ( autoreconf -i -f )
	cd cmd && ( ./configure --prefix=/usr --libexecdir=/usr/lib/snapd $(VENDOR_ARGS))
	$(MAKE) -C cmd all

	# Generate the real systemd/dbus/env config files
	$(MAKE) -C data all

override_dh_auto_test:
	dh_auto_test -- $(GCCGOFLAGS)
# a tested default (production) build should have no test keys
ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
	# check that only the main trusted account-keys are included
	[ $$(strings _build/bin/snapd|grep -c -E "public-key-sha3-384: [a-zA-Z0-9_-]{64}") -eq 2 ]
	strings _build/bin/snapd|grep -c "^public-key-sha3-384: -CvQKAwRQ5h3Ffn10FILJoEZUXOv6km9FwA80-Rcj-f-6jadQ89VRswHNiEB9Lxk$$"
	strings _build/bin/snapd|grep -c "^public-key-sha3-384: d-JcZF9nD9eBw7bwMnH61x-bklnQOhQud1Is6o_cn2wTj8EYDi9musrIT9z2MdAa$$"
	# same for snap-repair
	[ $$(strings _build/bin/snap-repair|grep -c -E "public-key-sha3-384: [a-zA-Z0-9_-]{64}") -eq 3 ]
	# common with snapd
	strings _build/bin/snap-repair|grep -c "^public-key-sha3-384: -CvQKAwRQ5h3Ffn10FILJoEZUXOv6km9FwA80-Rcj-f-6jadQ89VRswHNiEB9Lxk$$"
	strings _build/bin/snap-repair|grep -c "^public-key-sha3-384: d-JcZF9nD9eBw7bwMnH61x-bklnQOhQud1Is6o_cn2wTj8EYDi9musrIT9z2MdAa$$"
	# repair-root
	strings _build/bin/snap-repair|grep -c "^public-key-sha3-384: nttW6NfBXI_E-00u38W-KH6eiksfQNXuI7IiumoV49_zkbhM0sYTzSnFlwZC-W4t$$"
endif
ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
	# run the snap-confine tests
	$(MAKE) -C cmd check
endif

override_dh_install-indep:
	# we do not need this in the package, its just needed during build
	rm -rf ${CURDIR}/debian/tmp/usr/bin/xgettext-go
	# toolbelt is not shippable
	rm -f ${CURDIR}/debian/tmp/usr/bin/toolbelt
	# we do not like /usr/bin/snappy anymore
	rm -f ${CURDIR}/debian/tmp/usr/bin/snappy
	# chrorder generator
	rm -f ${CURDIR}/debian/tmp/usr/bin/chrorder
	dh_install

override_dh_install-arch:
	# we do not need this in the package, its just needed during build
	rm -rf ${CURDIR}/debian/tmp/usr/bin/xgettext-go
	# toolbelt is not shippable
	rm -f ${CURDIR}/debian/tmp/usr/bin/toolbelt
	# we do not like /usr/bin/snappy anymore
	rm -f ${CURDIR}/debian/tmp/usr/bin/snappy
	# i18n stuff
	mkdir -p debian/snapd/usr/share
	if [ -d share/locale ]; then \
		cp -R share/locale debian/snapd/usr/share; \
	fi
	# chrorder generator
	rm -f ${CURDIR}/debian/tmp/usr/bin/chrorder

	# Install snapd's systemd units / upstart jobs, done
	# here instead of debian/snapd.install because the
	# ubuntu/14.04 release branch adds/changes bits here
	$(MAKE) -C data install DESTDIR=$(CURDIR)/debian/snapd/ \
		SYSTEMDSYSTEMUNITDIR=$(SYSTEMD_UNITS_DESTDIR)
	# We called this apps-bin-path.sh instead of snapd.sh, and
	# it's a conf file so we're stuck with it
	mv debian/snapd/etc/profile.d/snapd.sh debian/snapd/etc/profile.d/apps-bin-path.sh

	$(MAKE) -C cmd install DESTDIR=$(CURDIR)/debian/tmp

	# Rename the apparmor profile, see dh_apparmor call above for an explanation.
	mv $(CURDIR)/debian/tmp/etc/apparmor.d/usr.lib.snapd.snap-confine $(CURDIR)/debian/tmp/etc/apparmor.d/usr.lib.snapd.snap-confine.real

	# On Ubuntu and Debian we don't need to install the apparmor helper service.
	rm $(CURDIR)/debian/snapd/$(SYSTEMD_UNITS_DESTDIR)/snapd.apparmor.service
	rm $(CURDIR)/debian/tmp/usr/lib/snapd/snapd-apparmor

	# Ouside of core we don't need to install the following files:
	rm $(CURDIR)/debian/snapd/$(SYSTEMD_UNITS_DESTDIR)/snapd.autoimport.service
	rm $(CURDIR)/debian/snapd/$(SYSTEMD_UNITS_DESTDIR)/snapd.core-fixup.service
	rm $(CURDIR)/debian/snapd/$(SYSTEMD_UNITS_DESTDIR)/snapd.failure.service
	rm $(CURDIR)/debian/snapd/$(SYSTEMD_UNITS_DESTDIR)/snapd.snap-repair.service
	rm $(CURDIR)/debian/snapd/$(SYSTEMD_UNITS_DESTDIR)/snapd.snap-repair.timer
	rm $(CURDIR)/debian/snapd/$(SYSTEMD_UNITS_DESTDIR)/snapd.system-shutdown.service
	rm $(CURDIR)/debian/snapd/usr/lib/snapd/snapd.run-from-snap

	# snap-preseed is currently only useful on ubuntu and tailored for preseeding
	# of ubuntu cloud images due to certain assumptions about runtime environment
	# of the host and of the preseeded image.
	rm -f ${CURDIR}/debian/tmp/usr/bin/snap-preseed

	dh_install

override_dh_auto_install: snap.8
	dh_auto_install -O--buildsystem=golang

snap.8:
	# fix reproducible builds as reported by:
	#   https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/snapd.html
	# once golang-go-flags is fixed we can remove the "sed" expression
	$(CURDIR)/_build/bin/snap help --man | sed '1 s/^.*/.TH snap 8 "$(shell date --reference=debian/changelog +"%d %B %Y")"/' > $@

override_dh_auto_clean:
	dh_auto_clean -O--buildsystem=golang
	rm -vf snap.8

override_dh_gencontrol:
	dh_gencontrol -- -VBuilt-Using="$(BUILT_USING)"
